TECHNOLOGICAL FEATURES OF EXTRUSION OF COMPOSITE MATERIALS BASED ON MIXTURES OF HIGH AND LOW DENSITY POLYETHYLENE AND MINERAL FILLERS

The results of the study of the optimal mode of extrusion of composite materials based on mixtures of high-density and low density polyethylene with various mineral fillers and the selection of the optimal mode of this process are presented. As fillers, montmorillonite, bentonite, aluminum hydroxide, as well as their paired mixtures based on montmorillonite + aluminum hydroxide and bentonite + aluminum hydroxide were used. It was established that the loading of fillers into the composition of a polymer mixture of low density polyethylene + 50 mass.% highdensity significantly affects the optimal technological mode of their processing. The loading of montmorillonite and bentonite into the composition of the polymer mixture is accompanied by the preservation of the melt flow index at a sufficiently high level. With the loading of aluminum hydroxide, there is a noticeable deterioration in the rheological characteristics of the composites